Centrifugal machine.



No. 717,802. K *PATBNTED JAN. 6, 1903.

\ l. J. BVERRIGAN.

CENTRIPUGAL MACHINE.

APPLICATION FILED MAY 7, 1902. v No MODEL. 2 sHBBTs-SHEBT 1.

xrmlmn Pimm wlNEssEs: INVENTOR 2 SHEETS-SHEET 2.

INVENTOR PATENTED JAN. 6, 1903.

J. J. LBBRRIGAN.V GENTRIFUGAL MACHINE.

APPLGATION FILED MAY 7. 1902.

No MODEL.

WITNESSES:

Nrrnn Sfrnrns ArnN'r Fries..

CENTRIFUGAL MACHINE.

SPECIFICATION forming part of Letters Patent No. 717,802, dated January 6, 1903.

Application filed May '7, 1992. Serial No. 106,282. (No model.)

T0 all wtom/ t may concern: Y

Beit known that I, JOHN JOSEPH BEER GAN, a citizen of the United States, residing at East Orange, Essex county, New Jersey, temporarily residing at Stockholm, Sweden, have invented anew and useful Improvement in Centrifugal Machines, of which the followinf.r is a specilication. Y

The invention is an improvement upon the centrifugal machine for separating solids from liquids, set forth in United States Letters Patent No. 667,926, granted to me July 9, 1901.

The invention consists in the combination, with the separating-chamber,'of a iiltering device disposed inthe lower portion thereof, whereby solid material is prevented from escaping at the liquid-outlet and the said liquid rendered clear; also, in the construction of` said ltering device, as more particularly pointed out inthe claims.

In the accompanying drawings, Figure l is a vertical section of the machine, the lower portion of the standard and vertical driving-V shaft being broken away, on the line a: ofv

Fig. 3. Fig. 2 is an enlarged detail view of asimilar section of the lower part of the drum and separating-chamber with the filtering device therein. Fig. 3 is a section on the line y y of Fig. 2.

Similar numbers and letters of reference indicate like parts.

lis the standard, preferably cast integrally with the cup 2. In the cup is a rotary bowl 3, supported on the hollow .shaft 4, which shaft is rotated by any suitable means. (Not shown.) In the bowl 3 is eccentrically placed the separating-chamber 5. Bowl and chamber are closed bya cover 6, having a threaded iiange, by which it is secured upon the'bowl periphery. In the cover 6 is a central opening to receive the tianged plug 7, which supports the inlet-conduit 8. On the under side of the cover is secured a plate 9, having a longitudinal channel, (not shown,) into which channel the material from the conduit S is received and from which said material when the bowl rotates is projected by the action of centrifugal force against the inner periphery of the separating-chamber 5. In the wall of chamber 5 is an opening 10, which communicates with a tapering conduit 11, formed in a `ber 5.'

plate l2, which extends between the chamber 5 and the bowl 3. Said conduit Il has its smaller opening l2 in the wall of bowl 3. The openings 10 and l2'and conduit ll together form a passage through which the solid constituent of the material under treatment after separation escapes from the machine. Liquid communication is established on each side of plate 12 by the openings 14 therein.

Extending through the hollow shaft 4 is a rotary shaft 15, having on its end a pinion 16, which'engages with the pinionl? on the lower end of the shaft I8. Said shaft is journaled at its upper end in the plate 9 Within the separating-chamber 5 and at its lower end in the bottom of the bowl 3. The middle portion of said shaft is enlarged, and to it are connected the radial arms I9, having at their ends Scrapers 20, which Scrapers bear against the innerperiphery of the separating-cham- Communicating with the bottom of the separating chamber 5 and extending through the bowl 3 y is a tube 2l, through which liquid from said separating-chamber may pass into the cup 2 and escape therefrom at the opening 22. Supported on the cup 2 is a conical hood 23, which receives the solid material escaping from the opening l2.

The operation of the parts so far described is as follows: The combined solid and liquid material being introduced at the tube 8 is projected through the channels in plate 9 against the most eccentric portion of the inner periphery of the separating-chamber 5. Liquid communication is established from said chamber through the short tube 24 with the space between the bowl 3V and the separating-chamber 5. Consequently a liquidring is formed, as represented in Fig. 3, which ring extends around `Jthe inner periphery of the bowl 3 and is intersected by the cylindrical wall of the separating chamber 5. From the points of intersection of said liquidring and the wall of the separating-chamber 5 to the outlet lO in said wall the inner surface of said chamber is substantially dry. Vhile the bowl is set in rotation by the revolution of the hollow shaft 4, the inner shaft IDO 18 is also revolved by the inclosed shaft 15 and intermediate gearing 16 I7, and as a consequence the Scrapers 20 are carried around the inner periphery of chamber 5 and scrape f like.

off the solid material deposited at the most eccentric portion thereof and within the liquid-ring, as shown in Fig. 3, and carry said solid material out of said liquid-ring and over the dry space above defined to the opening lO in the wall of said chamber. As soon as the solid material is brought opposite said opening it is projected by the action of the centrifugal force through the conduit 1l and opening l2 in the wall of bowl 3, and so into the hood 23 or any other receptacle placed to receiveit. Meanwhiletheliquidpassesdown through the pipe 2l into the cup 2 and so out of the machine at the opening 22.

All of the foregoing construction is fully set forth and explained in detail in my aforesaid Letters Patent.

I will now proceed to describe the filtering device which constitutes my present improvement. This consists of two metal plates c1. and b, each having the form of a truncated cone and one being superposed on the other in such a way that a space is left between them. The lower plate ct has a ring-shaped or cylindrical portion c, which rests upon the bottom of the separating-chamber 5 and its within said chamber, a gasket cl being interposed between said ring and the chamberwall to make a tight joint. Immediately adjacent to the ring-shaped portion c the plate ahas a horizontal portion e, then an upwardly and inwardly inclined portion, and then a vertical portion f. The upper plate b is, as already stated, in the form of a truncated cone and rests upon the plate ot, its lower circumferential edge being received at the angle between the ring c and the horizontal portion e of said plate and its upper circumferential edge being beveled off, so as to receive and lit against the upper portion of the vertical cylindrical part f of plate ot. The annular space between the two plates a and b is filled with any suitable filtering material, such as cloth, blotting-paper, or the The two plates are held together by means of screws t', entering threaded offsets in the upper side of plate h and the lower side of plate ct, as shown. In the inclined portion of the upper plate b are made a number of holes g, the centers of which lie in a circle struck from the axial center of the bowl 3. In the inclined portion of the plate ct are similarly-placed holes h, each hole h being directly below its corresponding hole g. y The operation of this device is as follows: When the liquid-ring, as shown in Fig. 3, is formed, as already described, its inner circumference substantially bisects the holes g h, and the liquid in escaping passes down through the holes g, the filtering material between the plates, and through the holes h to the outlettube 2l. The finely-comminuted solid material which cannot pass through the filter remains in the holes g and upon the upper surface of plate b until a mass of it is deposited sufficient to be acted upon by the centrifugal force, when it is projected by said force outward upon the periphery of the separatingchamber 5, and so joins the main portion of the solid material already deposited there in the manner previously described and with said main portion of solid material is removed by the Scrapers and carried around to the escape-orifice 10. In case any solid material gets into the filter it is stopped by the upper layer of filtering material and nothing gets through the whole body thereof, so that the liquid emerging from the lower holes h is completely freed from said solid material and escapes in a clear state.

It will be observed that the above-described filtering device is located in the chamber 5 above the short tubes 24E, by means of which liquid communication is established between the chamber 5 and the outer bowl 3. The filtering device therefore acts to prevent any possible solid material getting into these tubes, and so clogging their openings.

I have constructed a practical operative full-size machine in accordance with the foregoing specification and have found the results to be as stated. Among other materials I have used the refuse from paper-pulp factories, in which small fibers of the pulp are suspended in the liquid, which fibers have nearly the same specific gravity as the liquid in which they are contained, and have found that even under such severe conditions as this the fibers are completely separated from the liquid, so that the liquid escapes perfectly clear and free from solid material.

I claim- 1. In a centrifugal machine, a rotary separating-chamber for the materials to be separated having a liquid-outlet in its bottom, and an outlet in its circumferential wall wherefrom the solid material deposited in said chamber is ejected by the centrifugal force of rotation, and a filtering device in said chamber disposed above said liquid-outlet, substantially as described.

2. In a centrifugal machine, a rotary separating-chamber for the materials to be separated having a liquid-outlet in its lower portion, and an outlet wherefrom the solid material deposited in said chamber is ejected by the centrifugal force of rotation, and a filtering device disposed in said chamber and above said liquid-outlet; the said filtering device having its upper surface formed and disposed so that the retained accumulated solid will be thrown therefrom by centrifugal force toward the inner peripheral surface of said chamber, substantially as described.

3. In a centrifugal machine, a rotary separating-chamber for the materials to be separated having a liquid-outlet in its lower portion, and an outlet wherefrom the solid material deposited in said chamber is ejected by the centrifugal force of rotation, and a filtering device disposed in said chamber and above said liquid-outlet the said filtering device having its upper surface in the form of a truncated cone, substantially as described.

IOO

IIO

4. In a centrifugal machine, a rotary separating-chamber for the materials to be separated, a bowl receiving said chamber adapted to hold a liquid for balancing said chamber withreference to its axis of rotation, the said chamber having an opening establishing liquid communication with said bowl and means within said chamber for filtering said liquid prior to its passage through said opening, substantially as described.

5. In a centrifugal machine, a chamber for the materials to be separated constructed to rotate on an eccentric axis passing through it and having in its lower portion a liquid-escape opening and an opening for establishing liquid communication with the hereinafter-named bowl, a rotary bowl concentric with said axis and surrounding said chamber, wherebya crescent-shaped chamberis formed between the wall of said bowl and said separating-chamber adapted to hold a balancing body of liquid, and a filtering device in said separatingchamber for filtering the said liquid prior toits passage through said openings, substantially as described.

6. In a centrifugal machine, a chamber for the materials to be separated constructed to rotate on an eccentric axis passing through it and having in its lower portion a liquid-escape opening and an openin g for establishing liquid communication with the hereinafternamed bowl, a rotary bowl concentric with said axis and surrounding said chamber, whereby a crescent-shaped chamber is formed between the Wall of said bowl and said separating-chamber adapted 'to hold a balancing body of liquid, and a filtering device in said separating-chamber for ltering the said liquid prior to its passage through-said openings; the said dlterin g device being in the form ofa truncated conical annular shell, containing fltering material, disposed above said openings and having a series of apertures in said shell, the centers of said apertures being on a circumference struck from the axis of rotation of said bowl, substantially as described. 4

7. The combination in a centrifugal machine of the type herein set forth with the rotating separating-chamber 5, having' liquidoutlet 21, of the truncated conical perforated plates a, b, disposed in said chamber and above said outlet and filtering material interposed between said plates, substantially as described. Y

8. The combination in a centrifugal machine of the type herein set forth with the rotary separating-chamber 5 having liquid-outlet 21, of the plate d having the ring portion c, horizontal portione, conical portion and vertical cylindrical portion f, the truncated conical perforated plate b resting upon saidv plate a, and filtering material interposed between said plates, substantially as described.

9. The combination in a centrifugal machine of the type herein set forth, with the eccentrically-placed rotary separating-chamber '5 having liquid-outlets 2l and 24 and the external rotary bowl 3 receiving said chamber, of the truncated conical plates a, b disposed in said chamber and above said outlets, and

filtering material interposed between said' plates; the said plates'having openings g, h, disposed with their centers upon a circumference struck from the axis of rotation of said bowl, substantially as described.

In testimony whereof I have signed my name to thisspecitication in the presence of two subscribing witnesses. l

JOHN JOSEPH BERRIGN.

Witnesses TH. WAWRINSKY, Orro Roo'rH. 

